Pressure-regulating valve.



PATENTED DEC. 4, 1906.

' E. MOLEAN. K

PRESSURE REGULATING VALVE.

APPLICATION FILED MAY 6. 1905.

NITED srArEs PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application 1118a May 6, 1905. Serial No. 259.242.

To all whom it may concern:

Be it known that I, EMBURY McLEAN a citizen of the United States, residing in the borough of Brooklyn, city and State of New York, have invented certain new and useful Improvements in Pressure- Regulating Yalves, of which the following is a specification. t

This invention relates to valves of a class having a diaphragm backed by a spring and controlling a valve for determining passage of fluid under pressure, as steam.

The object of the invention is to make such valves more reliable in action and to increase the range of movement of the diaphragm, andconsequently of the valve which it controls. To this end a relatively light spring is applied to the diaphragm and the additional pressure required is afforded by hydrostatic pressure.

Thus, for instance, if the back pressure upon the diaphragm is to be one hundred pounds its spring may represent ten pounds and a (column of fluid the remaining ninety pounds.

Foster diap Sofar' as I am aware such an o anization is broadly new and has manifest a vantages.

The accom anying drawing illustrates the invention a p ed to a form of the Well-known agm-valve.

a is the usual diaphra ,to which is attached the head or memb di' b, connected by links or levers to the valve-s indle 0. Steam entering at the left of the va ve-c'asing passes by passage (1 to the under side of the diaphra The construction illustrated is well own; Applied to the face of the diaphragm is a spring e, the pressure of which is adjustable by means of a screw-bolt provided with a lock-nut. Connecting with the space above the diaphragm is a vertical pi e 9, connected at the top to a fluid-supply tan k. In the example illustrated it may be assumed that the pressure upon the upper face of the valve and against which the steampressure beneath Lworks is one hundred pounds and that,say, tenor fiiteen pounds thereof may be represented by the reaction of the springs e and the remainder by the pressure of the column of liquid. 7 I

Of course the invention may be embodied in a variety of forms. a

Having thus full described my invention, what I claim, and esire to secure by Letters Patent, is-

i 1. A pressureregulating valve, comprising a casing havin a diaphragm extending therethrough, a valve member, and connections between the diaphragm and the valve member, means for a plying hydrostatic fluidpressure to one si e of the dia hragm, and a spring interposed between t e diaphragm and the top of the casing for supplementing the fluid-pressure.

2. A pressure-regulating valve, comprising a casin having an inlet and an outlet for the -flow o fluid, a valve member therefor, a

chamber arranged above the portion of the casing containing the valve, a diaphragm extending through said chamber and dividing the same into two compartments, means for admitting a fluid to one of said compartments, and a spring extending through said compartment and bearing upon the diaphragm to supplement the action of the fluid.

3. In a pressure-regulating valve a chamher having a diaphragm dividing the same into compartments, means for applying hydrostatic pressure to one side 0 phragm', and a tension device interposed be tween the diaphragm and the top of the easing, and bearing against said diaphragm to supplement the action v of the hydrostatic pressure.

4 A pressure-regulating valve comprising a casing having a fluid inlet and outlet, a valve controlling the passage between the in-" let and outlet, a chamber arranged above the valve and forming a part of the c a diathe diaphragm extending through such cham er and static pressure greatly in excess of the pressure exerted by such mechanical means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- EMBURY MOLEAN.

Witnesses: Z i

R. B. CAVANAGH, C. J. BATHJEN. 

